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Thread: Itty Bitty Double FLEX V2
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05-14-2016, 04:23 PM #30
Gary,
I get the best results with two identical hot ends. If you're trying to mix and match, you can probably make it work, but you're making it harder on yourself. I find that the same filament needs different settings in different hot ends--even temperature. ABS that prints great at 245C in a 3mm Hexagon may need 255C in a 1.75mm E3Dv6 to get the same layer adhesion.
I guess the real question is what you're trying to accomplish. If you want to play with a 3D printer, by all means buy whatever strikes your fancy and have fun tuning and trying. If you want to make things with a 3D printer, I recommend getting a matched pair of genuine E3Dv6 hot ends in 1.75mm and climbing the learning curve once.
As far as adjustment, I get as close to 1:1 filament movement as practical with the E-Steps setting in the Marlin firmware and then tune from there based on how the prints are turning out. I don't typically tune in the slicer. I just dial the E-Steps up and down with the printer control panel. If the top is a little overfilled, I turn it down. If it's got gaps, I turn it up. If I have layer adhesion problems, I make sure that my extrusion width is at least 120% of the nozzle size, and then turn it up slightly or raise the temperature.
If you're using my hobbed bolts in a 4:1 drive extruder (all of the Itty Bitty extruders) I recommend starting at 615. My printers are all set between 600 and 625. The differences are probably just due to the tolerances on the 3mm and 1.75mm filament I have.
James
Please explain to me how to...
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